91 On the other hand, when He would have similarity, not unity, of works, to be understood, He said: “He that believes in Me, the works which I do, shall he do also.” Skilfully inserting here the word “also,” He has allowed us similarity, and yet has not ascribed natural unity. One, therefore, is the work of the Father and the work of the Son, whether the Arians please so to think or not.
Source: On the Christian Faith (De fide) (New Advent)